I-polarity Reverse Rectifier

I-Polarity Reversing Rectifier (PRR) iyidivayisi enikezela amandla kagesi e-DC engashintsha i-polarity yokuphuma kwayo. Lokhu kuyenza ibe wusizo ikakhulukazi ezinqubweni ezifana ne-electroplating, i-electrolysis, i-electromagnetic braking, kanye nokulawulwa kwemoto ye-DC, lapho kudingeka khona ukuguqula indlela yamanje.

1.Isebenza kanjani
Izilungisi ezivamile ziguqula i-AC ibe yi-DC nge-polarity engaguquki. Ama-PRR akhela phezu kwalokhu ngokusebenzisa izinto zamandla alawulekayo—njengama-thyristors, IGBT, noma ama-MOSFET—ukuze ahlehlise ukugeleza kwamanje. Ngokulungisa i-engeli yokudubula noma ukulandelana kokushintsha, idivayisi ingakwazi ukuphendukisa ngokushelela noma ngokushesha okukhiphayo ukusuka kokuphozithivu kuye kokunegethivu.

2.Isakhiwo Sesekhethi
Ngokuvamile, i-PRR isebenzisa isilungisi sebhuloho esilawulwa ngokugcwele:
Okokufaka kwe-AC → Ibhuloho Lokulungisa Elilawulwayo → Isihlungi → Layisha
Ibhuloho linezici ezine ezilawulekayo. Ngokuphatha ukuthi imaphi amadivayisi aqhuba futhi nini, okukhiphayo kungashintsha phakathi:
▪ I-Positive polarity: i-current igeleza isuka kutheminali ephozithivu iye emlayishweni.
▪ I-polarity engemihle: i-current igeleza ibheke kolunye uhlangothi.
Amazinga kagesi angabuye alungiswe ngokushintsha i-engeli yokucupha (α), okuvumela ukulawula okunembile kwakho kokubili i-polarity nobukhulu.

3.Izicelo
(1)I-Electroplating & Electrolysis
Ezinye izinqubo zidinga okwamanje ukuthi zihlehle ngezikhathi ezithile ukuze zithuthukise ikhwalithi yokumboza. Ama-PRR ahlinzeka ngokuhlinzekwa kwe-DC okulawulwayo, okuqondiswa kabili ukuze ahlangabezane nale mfuneko.
(2)I-DC Motor Control
Isetshenziselwa umsebenzi oya phambili/okuhlehlayo kanye nokubhuleka okuvuselelayo, ukubuyisela amandla kusistimu.
(3)I-Braking kagesi
Ukuhlehla kwamanje kuvumela ukubhuleka okusheshayo noma ukukhululwa okulawulwayo kwamasistimu emishini.
(4)Ilabhorethri Nokuhlola
Ama-PRR ahlinzeka ngokukhishwa okuhlelekayo kwe-bipolar DC, elungele ucwaningo, ukuhlolwa, nokuhlolwa okudinga ukuhlukahluka okuvumelana nezimo.

Izilungisi zokubuyisela emuva i-polarity ziya ngokuya zibaluleka embonini nasocwaningweni. Bahlanganisa ukulawulwa kwe-polarity okuguquguqukayo nokuguqulwa kwamandla okusebenzayo, okubenza babaluleke ezinhlelweni eziningi zesimanje zamandla kagesi. Njengoba idivayisi nobuchwepheshe bokulawula buthuthuka, ama-PRR kulindeleke ukuthi athole ukusetshenziswa okubanzi nakakhulu.